lkml.org 
[lkml]   [2018]   [Jun]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v3 4/4] ima: Differentiate auditing policy rules from "audit" actions
On Mon, Jun 4, 2018 at 4:54 PM, Stefan Berger
<stefanb@linux.vnet.ibm.com> wrote:
> The AUDIT_INTEGRITY_RULE is used for auditing IMA policy rules and
> the IMA "audit" policy action. This patch defines
> AUDIT_INTEGRITY_POLICY_RULE to reflect the IMA policy rules.
>
> Since we defined a new message type we can now also pass the
> audit_context and get an associated SYSCALL record. This now produces
> the following records when parsing IMA policy's rules:

Aaand now I see you included the current->audit_context pointer I
mentioned in my comments for 3/4 ;)

So basically this should be fine, although I should point out that you
do not need to define a new message type to associate records
together. The fact that we don't associate all connected records is
basically a bug.

Anyway, patches 3/4 and 4/4 look good to me. Considering this is
likely going in during the *next* merge window, I would ask that you
convert from "current->audit_context" to "audit_context()" as soon as
this merge window closes.

Thanks!

> type=UNKNOWN[1807] msg=audit(1527888965.738:320): action=audit \
> func=MMAP_CHECK mask=MAY_EXEC res=1
> type=UNKNOWN[1807] msg=audit(1527888965.738:320): action=audit \
> func=FILE_CHECK mask=MAY_READ res=1
> type=SYSCALL msg=audit(1527888965.738:320): arch=c000003e syscall=1 \
> success=yes exit=17 a0=1 a1=55bcfcca9030 a2=11 a3=7fcc1b55fb38 \
> items=0 ppid=1567 pid=1601 auid=0 uid=0 gid=0 euid=0 suid=0 \
> fsuid=0 egid=0 sgid=0 fsgid=0 tty=tty2 ses=2 comm="echo" \
> exe="/usr/bin/echo" \
> subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
>
> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> ---
> include/uapi/linux/audit.h | 1 +
> security/integrity/ima/ima_policy.c | 4 ++--
> 2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
> index 65d9293f1fb8..cb358551376b 100644
> --- a/include/uapi/linux/audit.h
> +++ b/include/uapi/linux/audit.h
> @@ -148,6 +148,7 @@
> #define AUDIT_INTEGRITY_PCR 1804 /* PCR invalidation msgs */
> #define AUDIT_INTEGRITY_RULE 1805 /* policy rule */
> #define AUDIT_INTEGRITY_EVM_XATTR 1806 /* New EVM-covered xattr */
> +#define AUDIT_INTEGRITY_POLICY_RULE 1807 /* IMA policy rules */
>
> #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
>
> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
> index bc99713dfe57..f7230db217a7 100644
> --- a/security/integrity/ima/ima_policy.c
> +++ b/security/integrity/ima/ima_policy.c
> @@ -652,8 +652,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
> bool uid_token;
> int result = 0;
>
> - ab = integrity_audit_log_start(NULL, GFP_KERNEL,
> - AUDIT_INTEGRITY_RULE);
> + ab = integrity_audit_log_start(current->audit_context, GFP_KERNEL,
> + AUDIT_INTEGRITY_POLICY_RULE);
>
> entry->uid = INVALID_UID;
> entry->fowner = INVALID_UID;
> --
> 2.13.6
>

--
paul moore
www.paul-moore.com

\
 
 \ /
  Last update: 2018-06-05 02:22    [W:0.359 / U:0.900 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site